What do you think guys? how many years do we need for all people using BTC?
I think it will take a very long time for Bitcoin to be used by everyone in all countries of the world. my suggest is maybe for the next 20-30 years. indeed there are many surveys that show an increase in bitcoin users each year, but this applies only in developed and developing countries. in fact, in poor countries and some developing countries still prohibit the use and all bitcoin transactions. but I'm sure bitcoin users will increase if the government (a country) plays a role in cryptocurrency
We still have option to use fiat and yet to consider cryptocurrency depending on the areas that are being accepted.
Knowing that fact that not all of us are open for crypto nor they appreciate crypto for the best currency to use in an online transaction will be a hindrance for huge market adoption. Mass adoption will always be matter on how we look into it and how we give support for this technology.